Unfortunately there isn't a single lens that's good for all conditions.
VR28 is a good lens, it handles medium light conditions well. I have a pair of sun glasses with VR28 lens' & I feel it works in bright light conditions also. I know some don't/won't feel it has enough tint (to much light transmission) for bright conditions.
I'd suggest getting 2 lens, one for low light/flat light & one for bright/medium light.
I just purchased Oakley Crowbars as well, I got the HI permission (which came with the goggle frame), & blue iridium which I like for the bright to near flat light conditions.
If you can only get 1 lens at a time, I'd go for VR28, or permission.
I'd suggest trying to find a retail shop with Oakley products & see which lens you like best.
Also check, what backcountry.com
has for Oakley Crowbars.
Oakley has [THIS
] web page which gives you an idea of the different lens look like & gives you the conditions the lens would be best in.